Year	% of cohort
1960	64.19307
1961	65.796814
1962	65.499345
1963	66.124385
1964	66.488345
1965	66.176671
1966	66.748041
1967	66.497622
1968	66.772378
1969	66.597954
1970	66.240337
1971	66.935686
1972	67.31802
1973	68.702654
1974	68.538739
1975	68.691397
1976	69.543752
1977	69.778704
1978	69.66716
1979	69.743486
1980	70.219306
1981	70.663222
1982	70.677044
1983	70.694664
1984	71.430443
1985	72.426944
1986	73.387042
1987	74.119464
1988	74.891035
1989	75.020117
1990	75.734453
1991	75.803406
1992	76.114099
1993	76.622137
1994	77.193387
1995	77.459816
1996	78.24444
1997	79.085144
1998	80.145066
1999	80.455541
2000	80.807417
2001	81.64668
2002	81.967865
2003	82.140178
2004	82.512272
2005	82.75262
2006	83.484839
2007	83.712215
2008	84.080628
2009	83.518212
2010	83.880746
2011	84.595909
2012	85.040095
2013	85.418594
2014	86.015968
2015	86.059031
2016	86.661851
2017	87.035216
2018	87.028248
2019	87.575718
2020	87.392972
2021	86.806294
2022	88.047364